Steve - I would think that you would want to replace and even improve upon the original sound isolation materials in the Electrovert even if there were indeed a "magic" box (which there isn't). There are many newer types of foam insulation such as composites with a lead or other high mass material backing. Start with the least amount of intrusive sound in the workplace. FYI the white noise solution, as pointed out, will not work in a high noise level environment. It is a common technique used in low noise environments such as large open offices or cubie farms. Low level white noise on a distributed sound system will mask the sound of your neighbor's phone conversation or his crappy radio station without actually being apparent. John Thorup > -----Original Message----- > From: Stephen R. Gregory > Sent: Friday, May 12, 2000 6:27 PM > To: [log in to unmask] > Subject: [TN] Noise suppression using "white noise"... > > Hi ya'll!! > > This post may be a little strange, but I'll ask anyway. We're getting > ready > to put a used Electrovert H-500 out on our floor. We currently have a old > Hollis Poly-clean. When you look at the blowers on a Poly-Clean compared > to > the blowers on the H-500, the H-500's blowers look about twice as > big...and > the Hollis is kinda' loud...but people don't complain too much when it's > running...I don't know about the H-500 though. > > The sound suppresion foam on the inside of the H-500 needs replacing, it's > deteriorated quite a bit. But there's a person here that is suggesting > that > instead of replacing the foam, look into "white noise" generators. This > person says that when they were in a machine shop environment, "white > noise > generators" were amazing as far as lowering the decible level of the > machines. > > I have to plead ignorance on this subject. Do any of you have any > knowledge > about this? Or have any first hand experience with "white noise > generators"? > > Myself, I think we should just replace the sound suppression foam, but > this > person swears that "white noise generators" is the way to go (but they > can't > tell me where I can find this stuff)...if that is true, where do I go to > get > these generators (speakers and certain frequency sources I assume)? Is > there > such equipment? I've searched the web, but can't find anybody that sells > this > stuff (makes me more confidant that I should just replace the sound > suppresion foam). > > Is this just a bunch of gobble-dee-gook or what? > > -Steve Gregory- > > ############################################################## > TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c > ############################################################## > To subscribe/unsubscribe, send a message to [log in to unmask] with > following text in > the body: > To subscribe: SUBSCRIBE TECHNET <your full name> > To unsubscribe: SIGNOFF TECHNET > ############################################################## > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for > additional > information. > If you need assistance - contact Keach Sasamori at [log in to unmask] or > 847-509-9700 ext.5315 > ############################################################## ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################